module.exports = {
	browser: function(u) {
		return {
			trident: u.indexOf('Trident') > -1, //IE内核
			presto: u.indexOf('Presto') > -1, //opera内核
			webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
			gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核
			mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
			ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
			android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器
			iPhone: u.indexOf('iPhone') > -1, //是否为iPhone或者QQHD浏览器
			iPad: u.indexOf('iPad') > -1, //是否iPad
			webApp: u.indexOf('Safari') == -1 //是否web应该程序，没有头部与底部
		};
	},
	getClientIp: function(req) {
		var ipAddress;
		var forwardedIpsStr = req.header('x-forwarded-for');
		if (forwardedIpsStr) {
			var forwardedIps = forwardedIpsStr.split(',');
			ipAddress = forwardedIps[0];
		}
		if (!ipAddress) {
			ipAddress = req.header('x-real-ip') || req.ip;
		}
		return ipAddress;
	}
};